PC restart / shut down issue

I am recently unable to restart or shut down my pc. I tried to reset the pc and waited though no restart, i thought perhaps the reset might force the pc to restart though it did not, and possibly by resetting the pc that it might fix the issue. So unable to do a reset.

I have also installed a security software and carried out a full system scan, nothing malicious found. Thought I would try this to see if it might find something that Windows Defender did not.

Thank you for your response Fruit Bat. I have tried WIN + R etc and this has not worked. I have also copied and pasted the command provided into Command Prompt. It read - The boot configuration data store could not be opened. Access is denied.

Thank you for your reply Govan. I tried what you mentioned in cmd and it says - You must be an administrator running a console session in order to use the sfc utility. I am not sure how to get into administrator mode.